Abstract
This study concerns damage localization method based on nonlinear elastic wave modulation spectroscopy. When fragments of a contact-type damage is rupping and crapping in synchronization with the low-frequency vibration, a high-frequency wave which propagates through the damage may undergo amplitude and phase modulation at the damage location because the scatter characteristics of high -frequency waves in the vicinity of the damage may fluctuate in synchronization with the low-frequency vibration because of the contact acoustic nonlinearity. Since thi modulation propagates through the structure with the group velocity, it may be possible to estimate damage location by measurering the modulation and performing an inverse analysis based on the wave propagation model. In this paper a mathematical model of the phase modulation propagation on a Timoshenko beam is constructed, and by considering the damage as a source of the modulation wave, a localization algorithm which utilizes the time difference between the demodulated waves measured by sensor arrays located at both sides of the damage is proposed, and examind experimentally.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: The Proceedings of the Symposium on Evaluation and Diagnosis
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
